Tyson Fury insists his heavyweight showdown with Anthony Joshua is in doubt because of a feud between rival promoters Eddie Hearn and Dana White.
The two British heavyweights have agreed to fight in Cardiff on December 11 and are scheduled to face off at a press conference in London on Wednesday.
But shortly after the contest was announced last week, Matchroom Sport chairman Hearn disputed White's involvement after the American boss of the UFC and Zuffa Boxing was officially named as a promoter alongside The Ring, which is owned by Saudi Arabian powerbroker Turki Alalshikh.
Hearn and White have been at loggerheads for months amid a disagreement over where the fight should take place, and Fury warned it is now in jeopardy because of Joshua's long-term promoter.
Fury said: "Breaking news. Anthony Joshua and Eddie Hearn are trying to pull out of this fight. They're saying they're not gonna fight now." He added: "It's mainly to do with Eddie Hearn's ego."
Multiple attempts to arrange the highest grossing event in British boxing history have failed, most notably in 2021 when Deontay Wilder used arbitration to force a trilogy fight with Fury when the 'Gypsy King' had a signed contract with Joshua.
Fury has suggested that alternative opponents to Joshua are now being lined up for him. The Press Association has contacted Matchroom for comment.